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mfd: sm501: Avoid implicit sign extension

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Suspicious implicit sign extension where 'reg' (unsigned char) is
promoted in reg << clksrc to int, then sign-extended to unsigned
long. If reg << clksrc is greater than 0x7FFFFFFF, the upper bits
of the result will all be 1.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Lee Jones 2014-08-18 16:11:27 +01:00
parent 8a012ff9d8
commit 5f114ebcee
1 changed files with 1 additions and 1 deletions
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2
drivers/mfd/sm501.c
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@ -514,9 +514,9 @@ unsigned long sm501_set_clock(struct device *dev,
unsigned long mode = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
unsigned long gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
unsigned long clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
unsigned char reg;
unsigned int pll_reg = 0;
unsigned long sm501_freq; /* the actual frequency achieved */
u64 reg;
struct sm501_clock to;